(2a-2+3ab-b-2-\(a^2-4ab+2b^2\)) को सरल करने पर क्या मिलेगा?
What is obtained after simplifying (2a-2+3ab-b-2-\(a^2-4ab+2b^2\))?
Explanation opens after your attempt
B. \(a^2+7ab-3b^2\)
Concept
Signs change in the subtracted bracket. The simplified form is \(2a^2+3ab-b^2-a^2+4ab-2b^2=a^2+7ab-3b^2\).
Why this answer is correct
The correct answer is B. \(a^2+7ab-3b^2\). Signs change in the subtracted bracket. The simplified form is \(2a^2+3ab-b^2-a^2+4ab-2b^2=a^2+7ab-3b^2\).
Exam Tip
घटाने वाले कोष्ठक के चिन्ह बदलेंगे। सरल रूप \(2a^2+3ab-b^2-a^2+4ab-2b^2=a^2+7ab-3b^2\) है।
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